Slug-trimming knife for line-casting machines.



I T. s. HUMANS. YS'LUG Tmmrvlme KNIFE ron LiNE-CASTING MACHINES.

APPUCATION FILED APR-11, I916.

' I Pat ented Oct. 2,4;19113'.

WITNESSES: k INVENTOR fl0WdJ L5l and ATTORNEY rename. I

f Toall whom it may Conchita a p 1/ 1 Beitknown that 1,! THOMAS Sgl-lomans, a citizen of the United States, 'residin v at Hempst'eadin .the county of Nassal and-- Stateof. New York, have invented new and THOMAS S.

* ll WEN "rains. 'PAjlETJl OFFIC i;

HOMANS, or nnmrs'rnnn, NEW YORK, ASSIGNOR r INTERTYPE conrona- TIQN,,0F1\TEW YORK, n. 11., ,a conrona'rron or new YORK.- P

v stue-crmiviivime KNIIEEYFOJB. 'n'ntn ca's rinq MACHI ES,

useful Improvements in SIugJ Irimming Knives forLine-Casting Machines, of.which;

" I ting the knife; Fig.- 5 is a detail view of one. end of the adjustable knife'and the oowherein .type slugs are cast from lines, of; I matrices, the slugsbeingejectedffrom'. the. a mold and forced between an pair',, of--kniveswhicht'rim the flat sidesof the slugs tothe the following is a specification.

My present invention relates especially to those of the linotypeclass In linotype machines as here 0 chine, the .guidingmeans for the movable ..or adjustable knife could not be 'inade suf j fic'iently. long inproportion to the'flength of the knife-to insure accuratefparallelism between theknivesg In orderto trim slugs of various thicknesses according to the diifer-2 T this adjustment between the knives be made ent sizes of type required, it is desirable that fwith great accuracyin' order-that the slugs may lie trimmedwl'ththeir flat sides in absolute parallelism and to exact size.-

-'llhe object of thepresent' invention is to provide improved imeans for gulding, ad-

justing'and holding the movable or adjustable slugtrimming knife at the proper dis tance from the cooperating knife to insure precision in tire trimrnlng of the slugs whereby the slugs will be trinnnedaccu rately according to the size of the type and the .eppesite sides of the slug will be in precise parallelism, the knife-adjusting means v being -,of a character that will enable the necessary adjustments to be made quickly and with, ease.

' To these and other ends, the invention consists in certain improvements, and corn v will be hereinafter described, the novelfe'a tures beingv pointed out partlcularlyiin the,

binations and arrangements of parts, all as claims at'theend of the specification. y

lathe accompanying drawing 'lFiguregl' slide having a spindle 14; thereon, and this representsv an axial or longitudinal section I to simp'rovements in line casting mach1nes,'and more mg the 0 I141 structed, the slug trinnning. means e'm'bbdied, a pairof knives,-one}of which was movable Y or adjustable and! was, usually mounted to slide transversely 'of its 1 length, [but owing? to. the limited 'spaceQavailable-in the'ni'af' to. the-particular construction and arranges e ma. of at as went, Patented net. 2i, lain. gfllpplication filed a riii gieie; f'se ri inaaonse.

' through a trimming device constructedinaccordance'with the present invention.

1 Fig. 2 is .an end view of the same, looking toward the-left in Fig. 1-. Fig. 3, is a Pen spectjive view of the; movable or/ adjustable', =kn1f6 audits adjusting means; QFig. 4 is a detail perspective view of the dial for setoperatingpartsashowing means for adjustrnovable knife on" its carrying head Similar piartsare designated .by the same reference characters in the several views;

. The present invention is applicable genproper thicknesses accordingtoflthe:dilferent'if ferally' to typographical machines of the type i "sizes of type. J' Qadaptedto cast type slugs from lines of ;matrices2i-f '.lhe invention is shown and will be hereinafter described as applied to a slug trimming device of a type adapted for -use especially "on'line casting machines of the 'linotype class. Itlisi to be understood, however,'that the invention is not restricted portion of the-vise frame of a machine of the linotype class, the same having one of the. slug trimmingt Ives 2 fixed thereon, and 3 designates the knife block which is fixed to the vise frame. The adjustable or movable slug trimming knife 4' is mounted *on a head or slide 5, the latter being slidable on the knife block, As shown, a pair knife block. This slot and key maryyhowever,be dispensed with, if desired. The

knife 45 is properly set relatively to the slide 5- by. a set-screw 9 which is carried at each: end of the slide 5 and bears against the a screw 10 is tapped into each end of the knife land extends through an opening in the slide. a compression spring 11 oper- -ating hetween the slide 5 and the'he d of of'screws 6serve to secure the knife/i upon 1 adjacent edge of the knife 4. Preferably, I

.the sicrew 10 and serving tohold the knife el inengagement with'the set-screws 9. The ",zslide-fi is secured .to a second slide 12 by ,screws 'or equivalent means 13, the second spindle is formed with chamber 15 to contam a coiled compression spring 16, one end I is secured b 1 The sprlng fitted to rotate on the spindle riphery of the adjusting screw is formed ferent thicknesses.

through segmental with accurately cut threads 20 which "cooperate .with a correspondingly threaded portion 2-1 which is'fixed' toor forms a part of the knife block 3.- .A ha-nd-wheel 22 is provided for adjustingthe screw--19- toset" the knives for the trimming of slugs of dif As shown, this handwheel is fixed to the adjusting screw by a suitable number of screws 23 which extend slots 24 in the handwheel and are tapped into the face of the adjusting screw. The periphery of the hand-wheel is provided with a scale 25" Which is graduated in accordancewith the different thicknesses .of type slugs, andan index or pointer 26 is attached at a suitable 1 point "to'the knife block and it enables the mlng knives at the ing to. the 'sizeof v will be precisely parallel. It is also desirable between the trimming knives. 'ming knives are set by manipulation of the hand wheelto be set so as to space the trimtrimmed.

In the operation of machines of the linotype class, each slugcast in the mold from a line of matrices is ejected therefrom by an ejector, and this ejector pushes the slug The trimhand-wheel so as to provide a space between them corresponding to the thickness of. the type slug to be produced. The knives-must be set in precise parallelism and maintained in parallelism during the trimming of the slugs in order that the flat sides of the slugs to set and maintain the knives at precisely the correct spacing in order to trim the slugs to the exact thickness corresponding to the size of type to be produced. Upon reference to Fig. 2 it willbe observed'that the knife 4 has a sloping or inclined edge vwhich causes a deviation of this edge of the knife from a right angle to the line of movement of the slug as the latter; passes between the knives. This deviation from the right angle is desirable, as it produces a shearing cut, but ltfPI'OdllOES a thrust first upon the higher end of the knife or the end of the knife which is first engaged. by the slug, and this thrust has a tendency to twist the knife.

The present invention provides means for effectively sustaining this twistproper distance accord.- the type slug to bef graduation on the dial 25.

tively for by the setscrews 9.

a diameter as nearly equal to the length of the knife as is practicable. Owing to this relatively large. diameter of the adjusting screw. and its engagement with the threaded portion 21 of the knife block, the adjusting screw has a relatively firm and true support, which will prevent deflection thereof when subjected to pressure in an axial -direction at onepoint toward or at its pe- "riphery. Withthis arrangement, when the thrust-first comes upon the higher end of the knife 4 or the end thereof which is first engaged by the slug, the pad 27 opposite to that end of the knife will bearagainst the adjusting screw at or near the periphery thereof, and as the adjusting screw is firmly supported at its periphery by the rigid portion 21 of the knife block, twisting or deflection of the knife 4 is pad 27 at the opposite end of the knife sustains the thrust imposed thereonpand the thrust of this pad in turn is sustained by the prevented. The

adjusting screw 'at or near the periphery thereof, accurate setting and precise parallelism of the knives being thereby main-' tained.

To vary the setting of the knives for the trimming of slugs of different thicknesses according to the varying sizes of type, it is only necessary to rotate the hand-wheel 22 in the appropriate direction until the index or pointer 26 registers with the appropriate Compensation for wear or grinding of the knives is provided for by the screws 23 and the segmental slots 24. Should such compensation become necessary, the hand-wheel can be reset relathe index or pointer 26 will re'ad correctly with the dial 25. Compensation for uneven wear or grinding of the knives is provided Lost motion between the difi'erent parts, and particularly between the thread of.,.the adjusting screw and the support 21, is takenup automatically by the spring 16 which exerts an end thrust on the screw but allows the latter to move axially to effect the different adjustments or settings of the ives. This spring also holds the pads 27 firmly against the cooperating surface formed on the face of the adjusting screw.

.I- claim I; Slug trimming means for line castin -machines comprising cooperative knives relatively adjustable to trim slugsof differto the adjusting screw in order that I cut thicknesses, and means for relatively adjusting said knives embodying an adjusting screw of a diameter approximately as great as the length of the working edges. of the knives, means coiiperating with the threaded portion of the'screw to sustain axial thrust thereon, and abutments between one of the knives and the eripheral portion of the screw for sustaining thrust at any point on the cutting edge of such knife.

2. In a line casting machine, the combination of a support, a knife mounted to move on the support transversely of its length, a screw threaded into the support for adjusting the knife to the required settings, the

diameter of the screw being approximately equal to the length of the working edge'of the knife, and abuttingsurfaces between the knife and the rim of the screw to resist the pressure at any point of the cutting edge of the knife.

3. Slug trimming means. for line casting machines comprising a support, a relatively -kIlife capable of bein fixed knife thereon, a cooperating adjustable set at different distances from the fixe knife, an adjusting screw for said knife having its thread cooperating with said support and provided with a thrust-sustaining surface of a diameter approximately equal to the length of the cutting edge of the adjustable knife, and

thrust-sustaining abutments interposed between the thrust-sustaining surface of the screw and the ends of the adjustable knife.

machines'comprising a support, a relatively 1 fixed knife thereon, a cooperating adjustable knife capable of'being set atdiiferent distances from the fixed knife, a slide carrying the adjustable knife and provided with thrust-sustaining abutments located behind the respective end portions of such knife, and an adjusting screw having its thread 4. Slug trimming means for line castinglift;

cooperating with said support and provided with a peripheral thrust-sustaining surface to cooperate with said thrust-sustaining abutments. 5. Slug trimming means for line casting machines comprising a support, a relatively fixed knife thereon, a cooperatin adjustable knife capable of being set at dlfi'erent dis tances from the fixed knife, a slide carrying the adjustable knife andrprovided with I thrust-sustaining abutments located behind the respective end portions of such knife,

the slide having a spindle thereon, and an I, adjusting screw "mounted rotatably on sald spindle and havin its thread cooperative with said support, t e screw having a thrustsustaining surface near its rim cooperative with said thrust-sustaining abutments.

6. In a line casting machine, a fixed and movable knife, a spring centrally disposed urging the movable kmfe in; one direction, and a screw to adjust the knife in the reverse direction, said screw abutting the knife {at opposite ends to secure parallel movement of the knife against the spring.

7. Slug trimming means for line casting machines comprising a support, cooperative relatively adjustable knives, a member car- Witnesses:

E. M. GOODBODY, DAVID L. ANDERSON.

THOMAS s. HOMANS. 

